Phenomena (philosophy)

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In philosophy, phenomenon is an observable event or physical manifestation capable of being observed by the human senses. Phenomena is the plural form.

The term came into its modern philosophical usage through Immanuel Kant, where it is contrasted with noumenon (for which Kant used the term "Ding an sich", or "thing-in-itself") or Absolute. Phenomenon and noumenon serve as interrelated technical terms in Kant's philosophy. Noumena, in contrast to phenomena, are not directly accessible to observation. Nowadays, "phenomena" are often, but not always, understood as 'appearances'. These are themselves sometimes understood as involving qualia.